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Executive Standard: SA299 Gr. B steel plates comply with the ASME standard, specifically ASTM A299/A299M.2026-08-26
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SA299 is a carbon-manganese-silicon steel plate designed for pressure vessels—often referred to as "gas drum steel" under US standards.2026-08-19
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ntroduction to SA299 Gr.A Steel Plate:
SA299 Gr.A is a steel plate grade designated for boilers and pressure vessels under American standards.2026-08-11 -
A285 Gr.C and SA285 Gr.C steel plates represent the same grade, though they are governed by different standards.2026-08-04
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SA283 Gr.B is a low-to-medium strength carbon structural steel plate conforming to the American Society of Mechanical Engineers (ASME) standard.2026-07-31
The smelting process of SPA-H steel
The smelting process of SPA-H steel plate
Must be after the treatment of hot metal desulphurization pretreatment, converter iron sulfur content is less than or equal to 0.010% and grilled net surface of molten iron slag smelting SPA-H steel iron requirements.
Nickel plate, copper or nickel copper alloy particles with scrap steel into converter. The carbon content of BOF steelmaking requirement is less than 0.06%, to prevent over oxidation of the molten steel. The tapping temperature control at 1640 to 1660 DEG C, before tapping first in the ladle into synthetic slag for baking.
SPA-H weathering steel using blocking slag stopper, slag stopping ball double blocking residue slag tapping, tapping process adding calcium barium, aluminum, manganese, titanium, silicon manganese, ferrosilicon, medium carbon ferrochrome, ferrophosphorus deoxidation alloying.